Hot-air wall-pipe.



J. W. .ZUGH.

HOT AIR WALL PIPE.

APPLICATION FILED JULY '22, 1907.

Patented Aug. 17, 1909.

QR E UNITED STATES PATENT OFFICE.

JOHN WM. ZUGH, OF MARSHALLTOWN, IOWA, ASSIGNOR TO THE LENNOX FURNACE CO, OF

MARSHALLTOWN, IOWA, A CORPORATION OF IOWA.

HOT-AIR WALL-PIPE.

To all whom it may concern I Be it known that I, JOHN \VILIJAM ZUoH, a citizen of the United States of America, and a resident of Marshalltown, in the county of Marshall and State of Iowa, have invented certain new and useful Improvements in Hot-Air Wall-Pipes, of which the following is a specification. I

This invention relatesto an improvement in hot-air wall-pipe, or, more particularly speaking, to wall-pipe made in joints or sections whose opposite ends slightly telescope and whose walls are made double with an intervening air-space, to and from which air-space suitable perforations or passageorifices are provided, and the object of the present invention is to provide each of such partially-telescopic sections in two independent corresponding L-shape members having rigid angles or corners and that freely interlock along two of their respective longitudinal edges andare thus adapted for use either with or without soldering or riveting and, also, adapted in a separated orknockdown manner for packin and shipping in compact form and, also, a apting'theseveral members of each section to be readily replaced or repaired the event of indenting or other similar injury, which latter is re- (laced to a minimum owing to said compact fornrof packing.

.Other features oi the inventionwill be fully hereinafter'described and particularly pointed out in the claiims. i In the accompanying sheet of drawings, illustrating my invention, Figure I is a View partly in: section and partly in elevation, but mostly in elevation, showing a series of four joints or sections of pipe connected together inhorizontal array (to accommodate this figure sidewise on the sheet,) the interlocking parts oil the two jointsat the right end of the View being shown, the interlocking parts of the second and third joints being shown. broken away andin section, and the interlocking parts between the' third and fiourthsections to" the left being also show-n broken. away and. in section atone corner to showthe manner of interlocking said parts; Fig. 2,.a. perspective view of on'e of the joints ,on'sectionsoi walhpifipe' comprising my invention, the two independent separable members thereof being shown closed or com neetedrtogetherready for use in donnecflion with other simiiarly closed? joints" or sec- Specification of Letters Patent.

Application filed July 22, 1907. Serial No. 385,016.

Patented Aug. 1'7, 1909.

tions; Fig. 3, a perspective view similar to Fig. 2, but showing both of the said independent separable members of the joint or section thrown apart; Fig. 4, a sectional elevation taken on the line a, a, of Fig. 1,

showing fragmentary parts of two connecting joints or sections of my wall-pipe; F 1g.

5, a cross-section taken on the line I), Z), of

Fig. 1, showing a section of'wall-pipe inaide up of two Independent oor'respondmgmembers with such members connected together in accordance with, my invention herein;

Fig. 6,'a diagraphic view showing fragmentary portions of the two independent menibers of a pipejoint at one of its s'eparably- "united corners, this view bringing more clearly to View the two connecting edges comprising the separable corner of my prp'e' joint the walls of which are made dotfble with an intervening air-space and such double-wall form being shown in the previo us views;- Fig. 7, adiagraphic viewsmrilar' to Fig. 6, but showing my,p1p'e' oint or sectionas it appears when made up of single sheet walls and,- also, showing the same kind of connection (as seen in Fig. 6). between the edges of said independent separable members at one of the longitudinal connecting corners thereof and Fig. 8 a diagraphic View showing the manner in which the independent separated members of the pipe sections or joints are nested for packing and shipping.

Inthese views, itwijll be seen that each pipe joint or section is'made' up of two independent members,- each member being L- slrape' in crosssecti'or and each member thus htvvln'g a body portion 1 with an integral sicl eportion 2, the latter lying at *arigid right-angle to said body portion.

. I have shown in all the views, except the last two- (Figs. 7 and 8) the several inde: pendent members of each joint or section .as'beingmad'e' double-walled with an inter-' vening air-space between the sheets forming such double Walls; The outer wall of suchdoulil'e'wall's forms the main shells of the sev ;era-l= members or sections, the inner sheets of such doublewalls forming auxiliary shells 5 for such sect-ions,"an'd it will be, seen that the single wa-ll or sheet form seenin Fig. 7 is praet icaily thesaine in construct-1011, so far sheets of -t he double-wall constri'ietion.

Iwill first describe'in detail the construe:

2 as this invention is concerned, as saidout er tion of each of the single wall members of the pipe-joint herein and then take up the construction of the double-wall form 'that'includes the inner sheets duly spaced from the.

outer sheets.

Ihave referred above to the body port-ion 1 having. the lateralside portions 2 and comprising each of the several independent members of each pipe-joint. Such members being each L-shape in cross-section, each of the lateral side portions 2 is made flat or plane and its inner longitudinal edge is bent or folded on itselfinwardly at 3, and then again'bent outwardly at 4 with a space intervenin said bends 3 and 4 and said part 4 extendlng beyond the edgeof its first bend that forms the part 3, as best seen in'Fig. 7. I have shown in said Fig. 7 but one of the sides of a joint or section, the other side being similar thereto and a shallow bend or flange 6 being made in the-metal sheet along the other edge of the body portion 1, opp0 site to that of theside portion 2. In assembling the two independent members comprising my joint or section of pipe the shallow bent edge or flange 6 is inserted in the s ace or slit 5 between the bends 3 and 4 o thev side portion 2, such space 5 being just suflicient to comfortably or snugly receive'said flange 6 and friotionally-hold the two members together. Said frictional-engagement of the flange 6 is suificient for ordinary purposes in setting up the pipe in place in walls or elsewhere, but in the, event the pipe is to be used in a placewhere the two members are apt to separate, owing to extraordinary conditions, solder' can be very readily applied, with a drop thereof at several points between the op osite ends of each joint, on the longitudina ly interlocking parts comprising the bends 3, 4 and 6. v

In the double wall form of pipe-section, the parts 1, 2, 3, 4, 5 and 6 are'practically the same as those just described in connection with the single wall form, except that the part or bend 4 in the metal along the part 2 does notextend beyond the line of the edge of the first bend that forms the part 3, but instead thereof, the said first 'bend in the part 2 extends beyond the line of the edge of said part 4, all-as best seen in Fig. 6. The parts thus far named comprise the outer sheets or shells of the several members forming a part of the doublewall form, the inner "shell or wall of such double wall form having a body portion 7 with an integral lateral I extension 8 at one end thereof and a shallow lateral extension 9 at the other end thereof, the extension 8 rejecting in a direction op-. 60 posite to that of the extension 9. The shallow extension 9 is disposed at a right-angle outwardly from the body portion 7 and abuts the inner face of the part 6 on the body portion 1 of the outer shell with its outer edge resting in the corner. resulting from the bend in the metal in constructing the part 6 on the part 1. The extension or bent part S) thus spaces the body portion 7 from the wall 1 and forms an air-chamber between said parts 1 and 7 in each of the several independent members forming my pipe-joint. The part 8 at the other end of the part 7 of the inner sheet or shell is bent along its outer edge so as to provide an extension. 10 parallel thereto and spaced awaytherefrom suliicient to leave a space between the parts 2 and 8 of the same width as that between the partsl and 7, such spare forming an airchamber along the narrow sides of the double form of pipe-sectiom The part 10 is inserted in the space between the parts 3 and 4 and is brought snugly up against the .part 4 with a space intervening between it (part 10) and the part 3, such space forming the longitudinal interlocking receptacle 35 for the portion of part (5 that extends beyond the face of part 7 all as best seen in Fig. 6. The opposite ends of the several members forming my double pipe section are closed by means of shouldered partsll and 12, part 11 being a shouldered one facing outwardly and forming the upper end of the joint and ,part 12 facin inwardly and forming the lower end of 'thejoint, such shouldered parts telescoping or engaging each other, as best seen in Fig. 4, where1n two sections of pipe are united in standing position for use.- Shouldered parts 12, at both endsof the several members of my pipe-joint, are provided with a series of perorations 13, such perforations registering when joints are connected together and permitting a circulation of air in the hollow walls of the double form of pipe-joints. The air space in my double form of pipe- 5 joint provides a suitable insulation .for the wall-pipe and prevents the radiationof heat and cold to and from the hot air passage in the wall-pipe, as customary.

The separable two-part knock-down form of wall-pipe sections above described and shown in the drawings is particularly etficacious in the convenience afforded for storage and shipping, saving of crating the goods, economizing in rates for freighting and in 5 the facility of repairing the sheets in case of damage by shipping or other handling.

It 1s quite obvious, without resorting to illustration in the drawings or extended description herein, that the wall-pipe .can be 0 made of two semicircular members instead of Lj-shape ones, each semicircular member having a plane flange along one longitudinal edge and a channeled or guttered flange alon its other longitudinaledge for separable 1 25 inter ocking engagement. The cylindrical pipe resulting from the use of separable interlocking members can'be of any suitable diameter for the purposes intended, hot air wall-pipe and stove-pipe being included in 11' such purposes. The sections of piping being thus separable when made on my two corresponding, independent member form, especially when used as stove-piping, each member of a section or joint can be lvery readilyseparated from the other and cleaned or replaced without affecting the other corresponding members. I claim 1. As a new article of manufacture, a pipe-joint composed of two independent and interchangeable corresponding members each of L-shapeor right-angle cross-section and with a rigid or integral corner or angle and adapted to be longitudinally-interlocked and freely engagable and separable laterally along their outer or free edges to and from each other. i

2. A pipe-joint comprising two independent corresponding'members each L-shape in cross-section and longitudinally-interlocking and separable, each L-shape member having .a longitudinal plane flange-edge and a longitudinal channeled or guttered flange-edge, the plane flange-edge of one member separabl interlocking lengthwise with the channeled or guttered flange-edge of the other member.

3. Wall-pipe comprising joints or sections -whose opposite ends interlock or telescope and each of which oints is composed of two independent corresponding members each L- shape in cross-section and having plane and grooved longitudinal flange-ed es that respectively' and separably inter ock lengthwise. H

4. Wall-pipe comprising separa 'le joints or sections each such joint being composed of two independent corresponding members that are each L-shape in cross-section and that separably interlock lengthwise and are each provided with plane fiangesalong one longitudinal edge and channeled or guttered flanges along the other longitudinal edge, such plane flanges engaging the channeled portions of said guttered. flanges .for said separable lengthwise-interlocking engagement.

JOHNWM. ZUCH.. Witnesses:

W. J. HEALD, THEo. JOHNSTON 

